A new method of deashing was provided to solve the difficulty of flotation deashing by some special kind of reagent changing the surfacenature of Zhungeer coal.
主要针对准格尔煤浮选降灰的难度，提出某种药剂改变准格尔煤表面性质，从而降低灰分的方法。
2
As the ocean surface warms, it mixes less with cooler, deeper waters, which contain much of the oceans nutrients, the Nature study says.
《自然》的研究表示，海洋表面变暖，与较深、较冷的水域混合变少，更深的水域包含很多海洋的养分。
3
Caves belong to the most enigmatic formations, created by Mother Nature on the surface of planet Earth, or, to be more accurate, beneath it.